Snoring active noise-cancellation, masking, and suppression

Abstract

A kit for attenuation of noise includes a noise source audio transducer, two ear pieces, and a control unit. The two ear pieces have respective resilient bodies that engage outer portions of ear canals of respective ears of a user while respective in-ear transducers of the two ear pieces are respectively positioned in inner portions of the ear canals. The respective in-ear transducers detect discrepancies (e.g., incomplete superpositioning) between the noise and the anti-noise. The respective in-ear transducers optionally detect respective secondary path effects in the ear canals. The noise source audio transducer detects noise generated by a noise source (e.g., snoring noise). The control unit configures an adaptive filter based at least in part on an error signal, and optionally based in part on secondary path effects. The control unit generates signals representative of anti-noise. The two ear pieces produce the anti-noise responsive to the signals. The two ear pieces produce masking noise with sound level that varies in direct correlation with sound level of the noise generated by the noise source.

Description

BACKGROUNDTechnical Field[0001]This disclosure generally relates to active noise cancellation, masking, and suppression, for example, via at least one in-ear transducer in an ear canal of a user's ear.Description of the Related Art[0002]Active noise cancellation (ANC) is a noise control strategy using secondary, “anti-noise” sources to cancel out the primary, unwanted noise. It relies on the ability to generate acoustic waveforms having the same amplitude and opposite phase as compared to those of the primary noise, at every frequency of interest, in a “zone of quiet.” Within this zone, the primary and secondary sources interfere destructively, and the noise level is reduced.[0003]Practical systems for ANC were first developed about 30 years ago and are now widely deployed, most commonly in the cabins of aircraft, automobiles, and heavy machinery, and as headsets for the mass consumer market. These systems typically provide 10-20 dB of active attenuation, concentrated at low frequen...

AI Technical Summary

Benefits of technology

[0012]1. White sound can mask whatever snoring sounds remain after passive attenuation and active cancellation.

[0013]2. Because snoring is often periodic, with quiet intervals, the below explained subject matter can analyze this pattern in real time and adjust the peaks of a masking sound for greatest effect at the lowest average volume. For example, the breaking of an ocean wave would be timed to coincide with the loudest few seconds of a snore (i.e., “smart masking”).

Problems solved by technology

Every night millions of people suffer from a restless sleep as a result of loud and / or disruptive snoring from a sleeping partner.

Existing ANC solutions are unsuitable for the unique situation of snoring attenuation.

Testing with commercially available headsets and earbuds highlights the limitations of existing products.

Listening tests with high-pass-filtered snore recordings demonstrate that good cancellation extending to 1 or 2 kHz is important, but the performance limitations of ANC restrict existing products to low-frequency scenarios like aircraft engine noise.

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